1312103012028 has 12 divisors (see below), whose sum is σ = 3061573694760. Its totient is φ = 437367670672.

The previous prime is 1312103012009. The next prime is 1312103012029. The reversal of 1312103012028 is 8202103012131.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1312103012028² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1312103011989 and 1312103012007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312103012029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54670958823 + ... + 54670958846.

It is an arithmetic number, because the mean of its divisors is an integer number (255131141230).

Almost surely, 2^{1312103012028} is an apocalyptic number.

It is an amenable number.

1312103012028 is an abundant number, since it is smaller than the sum of its proper divisors (1749470682732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312103012028 is a wasteful number, since it uses less digits than its factorization.

1312103012028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109341917676 (or 109341917674 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 1312103012028 its reverse (8202103012131), we get a palindrome (9514206024159).

The spelling of 1312103012028 in words is "one trillion, three hundred twelve billion, one hundred three million, twelve thousand, twenty-eight".